学帮网求做一道极限题
来源：学生作业学帮网 编辑：学帮网 时间：2024/05/24 03:51:55
求做一道极限题
(tanx-sinx)/(sin^3*x) = (sinx/cosx-sinx)/(sin^3*x) and (sinx/cosx-sinx)/(sin^3*x) = (1-cosx)/(cosxsin^2*x) and (1-cosx)/(cosxsin^2*x) = (1-cosx)/cosx(1-cos^2*x) and (1-cosx)/cosx(1-cos^2*x) = 1/cosx(1+cosx) and 1/cosx(1+cosx) = 1/2